Pass ConstString by value (NFC)

My apologies for the large patch. With the exception of ConstString.h
itself it was entirely produced by sed.

ConstString has exactly one const char * data member, so passing a
ConstString by reference is not any more efficient than copying it by
value. In both cases a single pointer is passed. But passing it by
value makes it harder to accidentally return the address of a local
object.

(This fixes rdar://problem/48640859 for the Apple folks)

Differential Revision: https://reviews.llvm.org/D59030

llvm-svn: 355553
diff --git a/lldb/source/Core/ValueObjectConstResultCast.cpp b/lldb/source/Core/ValueObjectConstResultCast.cpp
index 2c1264f..b47e699e 100644
--- a/lldb/source/Core/ValueObjectConstResultCast.cpp
+++ b/lldb/source/Core/ValueObjectConstResultCast.cpp
@@ -21,7 +21,7 @@
 using namespace lldb_private;
 
 ValueObjectConstResultCast::ValueObjectConstResultCast(
-    ValueObject &parent, const ConstString &name, const CompilerType &cast_type,
+    ValueObject &parent, ConstString name, const CompilerType &cast_type,
     lldb::addr_t live_address)
     : ValueObjectCast(parent, name, cast_type), m_impl(this, live_address) {
   m_name = name;